Okay, that was not apparent from your first post. You said '...LAD was 70%...', but it isn't clear from that syntax that it was blocked vs. clear/unobstructed.

So, at 70% blocked, and no restriction of flow, you don't need the stent. You'll be monitored yearly from now on, or should be, and when you get sufficiently blocked, whatever the limit is for your consulting physician, he/she'll say it's time.